rewrite a misprocessed teardown_method method as a custom decorator

teardown_method is a standard pytest method used to put any code to be executed
after each test method is executed. While treated correctly by our integration
tests, this method is misinterpreted by in-tree tests in the following way:
in-tree tests try to execute it even if all the test methods are skipped due to
test resources being not configured. This causes the tests, that otherwise would
have been skipped, to fail

https://fedorahosted.org/freeipa/ticket/5723

Reviewed-By: Martin Basti <mbasti@redhat.com>

ipatests/test_integration/tasks.py

@@ -1153,3 +1153,25 @@ def uninstall_replica(master, replica):
                         "-p", master.config.dirman_password,
                         replica.hostname], raiseonerr=False)
     uninstall_master(replica)
+
+
+def replicas_cleanup(func):
+    """
+    replicas_cleanup decorator, applied to any test method in integration tests
+    uninstalls all replicas in the topology leaving only master
+    configured
+    """
+    def wrapped(*args):
+        func(*args)
+        for host in args[0].replicas:
+            uninstall_replica(args[0].master, host)
+            uninstall_client(host)
+            result = args[0].master.run_command(
+                ["ipa", "host-del", "--updatedns", host.hostname],
+                raiseonerr=False)
+            # Workaround for 5627
+            if "host not found" in result.stderr_text:
+                args[0].master.run_command(["ipa",
+                                            "host-del",
+                                            host.hostname], raiseonerr=False)
+    return wrapped

ipatests/test_integration/test_replica_promotion.py

@@ -8,6 +8,7 @@ from ipatests.test_integration.test_caless import assert_error
 from ipalib.constants import DOMAIN_LEVEL_0
 from ipalib.constants import DOMAIN_LEVEL_1
 from ipalib.constants import DOMAIN_SUFFIX_NAME
+from ipatests.test_integration.tasks import replicas_cleanup
 
 
 class ReplicaPromotionBase(IntegrationTest):
@@ -16,19 +17,6 @@ class ReplicaPromotionBase(IntegrationTest):
     def install(cls, mh):
         tasks.install_master(cls.master, domain_level=cls.domain_level)
 
-    def teardown_method(self, method):
-        for host in self.replicas:
-            tasks.uninstall_replica(self.master, host)
-            tasks.uninstall_client(host)
-            result = self.master.run_command(
-                ["ipa", "host-del", "--updatedns", host.hostname],
-                raiseonerr=False)
-            # Workaround for 5627
-            if "host not found" in result.stderr_text:
-                self.master.run_command(["ipa",
-                                         "host-del",
-                                         host.hostname], raiseonerr=False)
-
     def test_kra_install_master(self):
         result1 = tasks.install_kra(self.master,
                                     first_instance=True,
@@ -47,6 +35,7 @@ class TestReplicaPromotionLevel0(ReplicaPromotionBase):
     num_replicas = 1
     domain_level = DOMAIN_LEVEL_0
 
+    @replicas_cleanup
     def test_promotion_disabled(self):
         """
         Testcase:
@@ -64,6 +53,7 @@ class TestReplicaPromotionLevel0(ReplicaPromotionBase):
                      'You must provide a file generated by ipa-replica-prepare'
                      ' to create a replica when the domain is at level 0', 1)
 
+    @replicas_cleanup
     def test_backup_restore(self):
         """
         TestCase:
@@ -172,6 +162,7 @@ class TestReplicaPromotionLevel1(ReplicaPromotionBase):
     num_replicas = 1
     domain_level = DOMAIN_LEVEL_1
 
+    @replicas_cleanup
     def test_replica_prepare_disabled(self):
         replica = self.replicas[0]
         args = ['ipa-replica-prepare',